EP 3460087 A4 20191106 - STEEL BAR FOR DOWNHOLE MEMBER AND DOWNHOLE MEMBER
Title (en)
STEEL BAR FOR DOWNHOLE MEMBER AND DOWNHOLE MEMBER
Title (de)
STAHLSTAB FÜR BOHRLOCHELEMENT SOWIE BOHRLOCHELEMENT
Title (fr)
BARRE D'ACIER POUR ÉLÉMENT DE FOND DE TROU ET ÉLÉMENT DE FOND DE TROU
Publication
Application
Priority
- JP 2016101932 A 20160520
- JP 2017018804 W 20170519
Abstract (en)
[origin: EP3460087A1] A steel bar for a downhole member is provided that is excellent in SCC resistance and SSC resistance. A martensitic stainless steel bar material for a downhole member of the present embodiment has a chemical composition that contains, by mass%, C: 0.020% or less, Si: 1.0% or less, Mn: 1.0% or less, P: 0.03% or less, S: 0.01% or less, Cu: 0.10 to 2.50%, Cr: 10 to 14%, Ni: 1.5 to 7.0%, Mo: 0.2 to 3.0%, Ti: 0.05 to 0.3%, V: 0.01 to 0.10%, Nb: 0.1% or less, Al: 0.001 to 0.1% and N: 0.05% or less, with the balance being Fe and impurities, and satisfies Formula (1) and Formula (2). Mo 4 × total Mo amount in precipitate at R / 2 position ¥ 1.30 Total Mo amount in precipitate at center position total Mo amount in precipitate at R / 2 position ¤ 0.03
IPC 8 full level
C21D 9/08 (2006.01); C22C 38/00 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/06 (2006.01); C22C 38/42 (2006.01); C22C 38/44 (2006.01); C22C 38/46 (2006.01); C22C 38/48 (2006.01); C22C 38/50 (2006.01); C22C 38/52 (2006.01); C22C 38/54 (2006.01)
CPC (source: EP RU US)
C21D 8/06 (2013.01 - RU); C22C 38/00 (2013.01 - EP US); C22C 38/001 (2013.01 - EP US); C22C 38/002 (2013.01 - EP US); C22C 38/02 (2013.01 - EP US); C22C 38/04 (2013.01 - EP US); C22C 38/06 (2013.01 - EP US); C22C 38/42 (2013.01 - EP US); C22C 38/44 (2013.01 - EP US); C22C 38/46 (2013.01 - EP US); C22C 38/48 (2013.01 - EP US); C22C 38/50 (2013.01 - EP RU US); C22C 38/52 (2013.01 - EP RU US); C22C 38/54 (2013.01 - EP RU US); C21D 9/08 (2013.01 - EP US); C21D 2211/008 (2013.01 - EP US)
Citation (search report)
- [XY] EP 2060644 A1 20090520 - SUMITOMO METAL IND [JP]
- [YA] JP 2001107141 A 20010417 - NIPPON KOKAN KK
- [YA] JP H1180881 A 19990326 - NIPPON KOKAN KK
- [A] US 2015044086 A1 20150212 - MIYANISHI KEI [JP], et al
- [A] JP 2002004009 A 20020109 - KAWASAKI STEEL CO
- [A] JP 2012158798 A 20120823 - JFE STEEL CORP
- [A] WO 2015033518 A1 20150312 - JFE STEEL CORP [JP]
- [A] JP 2001179485 A 20010703 - SUMITOMO METAL IND
- [A] EP 2947167 A1 20151125 - JFE STEEL CORP [JP]
- [A] EP 2865777 A1 20150429 - JFE STEEL CORP [JP]
- [A] EP 1683885 A1 20060726 - JFE STEEL CORP [JP]
- [A] JP 2005336599 A 20051208 - JFE STEEL KK
- [A] JP 2008050646 A 20080306 - JFE STEEL KK
- See references of WO 2017200083A1
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
EP 3460087 A1 20190327; EP 3460087 A4 20191106; EP 3460087 B1 20201223; AU 2017266359 A1 20181220; AU 2017266359 B2 20191003; BR 112018072904 A2 20190219; BR 112018072904 B1 20220906; CA 3024694 A1 20171123; CN 109154054 A 20190104; CN 109154054 B 20200605; JP 6264521 B1 20180124; JP WO2017200083 A1 20180607; MX 2018014132 A 20190429; RU 2710808 C1 20200114; US 10995394 B2 20210504; US 2019177823 A1 20190613; WO 2017200083 A1 20171123
DOCDB simple family (application)
EP 17799507 A 20170519; AU 2017266359 A 20170519; BR 112018072904 A 20170519; CA 3024694 A 20170519; CN 201780030687 A 20170519; JP 2017018804 W 20170519; JP 2017548488 A 20170519; MX 2018014132 A 20170519; RU 2018144619 A 20170519; US 201716099330 A 20170519